US3749715A - Method of preparing 2,3-dihydro-1h-pyrido-(2,3-b)(1,4)-thiazin-2-ones - Google Patents

Method of preparing 2,3-dihydro-1h-pyrido-(2,3-b)(1,4)-thiazin-2-ones Download PDF

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Publication number
US3749715A
US3749715A US00108206A US3749715DA US3749715A US 3749715 A US3749715 A US 3749715A US 00108206 A US00108206 A US 00108206A US 3749715D A US3749715D A US 3749715DA US 3749715 A US3749715 A US 3749715A
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United States
Prior art keywords
dihydro
pyrido
preparing
thiazin
ones
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Expired - Lifetime
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US00108206A
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English (en)
Inventor
R Stein
C Nordeen
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Abbott Laboratories
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Abbott Laboratories
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    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07DHETEROCYCLIC COMPOUNDS
    • C07D513/00Heterocyclic compounds containing in the condensed system at least one hetero ring having nitrogen and sulfur atoms as the only ring hetero atoms, not provided for in groups C07D463/00, C07D477/00 or C07D499/00 - C07D507/00
    • C07D513/02Heterocyclic compounds containing in the condensed system at least one hetero ring having nitrogen and sulfur atoms as the only ring hetero atoms, not provided for in groups C07D463/00, C07D477/00 or C07D499/00 - C07D507/00 in which the condensed system contains two hetero rings
    • C07D513/04Ortho-condensed systems

Definitions

  • the invention relates to an improved process for preparing 2,3-dihydro-1H-pyrido- [2,3-b] [1,4] thiazines.
  • Y is bromo, chloro, fluoro or iodo, preferably bromo
  • R is hydrogen or methyl
  • R is hydrogen, methyl or ethyl
  • the Z-mercapto 3 nitropyridine starting material can be prepared according to the method described in J. Pharm. Soc. Japan 64, 201-2 (1944).
  • the haloacetic acid moieties are commercially available.
  • the intermediate is then dissolved in 300 m1. of 2- methoxyethanol and hydrogenated in a Parr Shaker in the presence of Raney Nickel at 2 to 3 atm. hydrogen according to the method described in Example 1, lines 20-30 of US. Pat. 3,546,220 to yield 2,3-dihydro-1H- pyrido-[2,3-b][1,4]thiazin-2-one, M.P. 209-211 C.
  • the alkylation step can be carried out in a number of formamide, dimethylsulfoxide, acetonitrile and C -C alkyl alcohols.
  • the reaction is generally carried out at temperatures of from 50 to C. for from 1 to 24 hours.
  • a process for preparing compounds of the formula wherein R and X each represent hydrogen or methyl comprising the steps of reacting a 2-mercapto-3-nitropyridine of the formula ⁇ N/ SH wherein X is hydrogen or methyl, with a haloacetic acid moiety of the formula YCIJHi JORi wherein Y is bromo, chloro, fluoro or iodo, R is hydrogen or methyl and R is hydrogen, methyl or ethyl, in the presence of a suitable solvent to yield a 3-nitropyridin-y1- 2-thioacetic acid moiety of the formula NO; X L

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Nitrogen And Oxygen Or Sulfur-Condensed Heterocyclic Ring Systems (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
US00108206A 1971-01-20 1971-01-20 Method of preparing 2,3-dihydro-1h-pyrido-(2,3-b)(1,4)-thiazin-2-ones Expired - Lifetime US3749715A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US10820671A 1971-01-20 1971-01-20

Publications (1)

Publication Number Publication Date
US3749715A true US3749715A (en) 1973-07-31

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US00108206A Expired - Lifetime US3749715A (en) 1971-01-20 1971-01-20 Method of preparing 2,3-dihydro-1h-pyrido-(2,3-b)(1,4)-thiazin-2-ones

Country Status (9)

Country Link
US (1) US3749715A (fr)
BE (1) BE768305A (fr)
CA (1) CA932733A (fr)
CH (1) CH540287A (fr)
DE (1) DE2109636A1 (fr)
FR (1) FR2122826A5 (fr)
GB (1) GB1321360A (fr)
SE (1) SE372018B (fr)
ZA (1) ZA711249B (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040002495A1 (en) * 2002-05-20 2004-01-01 Philip Sher Lactam glycogen phosphorylase inhibitors and method of use

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040002495A1 (en) * 2002-05-20 2004-01-01 Philip Sher Lactam glycogen phosphorylase inhibitors and method of use
US7057046B2 (en) 2002-05-20 2006-06-06 Bristol-Myers Squibb Company Lactam glycogen phosphorylase inhibitors and method of use
US20060128687A1 (en) * 2002-05-20 2006-06-15 Philip Sher Lactam glycogen phosphorylase inhibitors and method of use
US7425550B2 (en) 2002-05-20 2008-09-16 Bristol-Meyers Squibb Company Lactam glycogen phosphorylase inhibitors and method of use

Also Published As

Publication number Publication date
GB1321360A (en) 1973-06-27
FR2122826A5 (fr) 1972-09-01
ZA711249B (en) 1971-11-24
DE2109636A1 (de) 1972-08-03
BE768305A (fr) 1971-12-09
CA932733A (en) 1973-08-28
SE372018B (fr) 1974-12-09
CH540287A (fr) 1973-08-15

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